device transfer

src/src/Sensor.java

@@ -0,0 +1,32 @@
+public class Sensor extends Thread {
+    private final long frequency;
+
+    public Sensor(long frequency) {
+        this.frequency = frequency;
+        start();
+    }
+
+    public long getFrequency() {
+        return this.frequency;
+    }
+
+    protected String reading() {
+        // eigentlich abstract
+        return null;
+    }
+
+    @Override
+    public void run() {
+        while(true) {
+            System.out.println("reading: " + reading());
+            try {
+                Thread.sleep(this.frequency);
+            } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            }
+        }
+    }
+    public static void main(String... args) {
+        var s = new Sensor(1000);
+    }
+}

src/src/Thermometer.java

@@ -0,0 +1,21 @@
+import javax.swing.plaf.TableHeaderUI;
+import java.util.Random;
+
+public class Thermometer extends Sensor {
+    private final Random rand;
+
+    public Thermometer(long frequency) {
+        super(frequency);
+        this.rand = new Random();
+    }
+
+    @Override
+    protected String reading() {
+        return String.format("(%04d freq.): %3d°C", getFrequency(), this.rand.nextInt(100));
+    }
+
+    public static void main(String[] args) {
+        var s1 = new Thermometer(1000);
+        var s2 = new Thermometer(3000);
+    }
+}